Systems, apparatuses and methods for fluid infusion into a body

ABSTRACT

Embodiments of the current disclosure are directed toward systems, devices and methods for diabetes management. In particular, the present disclosure relates to devices and methods for dispensing insulin to a patient. A portable fluid infusion device, comprising a disposable part (DP) and a reusable part (RP) is disclosed. The DP comprises a first reservoir and a second reservoir, the second reservoir less than or equal to the first reservoir in length, while the RP comprises a first compartment configured to receive the first reservoir, a second compartment configured to receive the second reservoir and a gasket for sealing a junction between the second reservoir and the second compartment upon connection of the RP and the DP.

FIELD OF THE DISCLOSURE

Embodiments of the current disclosure are directed toward systems,devices and methods for diabetes management. In particular, the presentdisclosure relates to devices and methods for dispensing insulin to apatient. More particularly, the present disclosure relates to aminiature portable skin securable insulin patch pump.

BACKGROUND OF THE INVENTION

Diabetes mellitus patients require administration of varying amounts ofinsulin throughout the day to control their blood glucose levels.Ambulatory portable insulin infusion pumps can be used as superioralternatives to multiple daily syringe injections of insulin. However,although these devices represent an improvement over multiple dailyinjections, they nevertheless all suffer from several drawbacks. Onedrawback is the large size and weight of the devices, caused by theconfiguration and the relatively large size of the driving mechanism andsyringe. These relatively bulky devices have to be regularly carried ina patient's pocket or attached to his/her belt.

SUMMARY OF SOME OF THE EMBODIMENTS

Embodiments of the present disclosure are directed at a diabetesmanagement system that includes a miniature insulin patch pump. Thepatch pump may be controlled by any electronic device (a “bridge”device) having an RF communication means such as Bluetooth or BluetoothLow Energy (BLE). Software that includes patient and pump controlparameters may be stored in a remote server and may be downloaded to thebridge device after receiving user authentication. The bridge device mayprovide two way communication between the patch pump and a remotestation such as physician office PC or remote smartphone of a diabeticchild parent. The patch pump may be integrated in a diabetes managementsystem that includes a continuous glucose monitor (CGM) and a bloodglucose monitor (BGM). An artificial pancreas algorithm on patch pumpprocessor automatically controls insulin delivery according tocontinuous glucose readings received from a remote CGM (“closed loopsystem”). The bridge device processor includes bolus calculator softwarethat may calculate and recommend bolus doses. Calculations of bolusdoses is done by a bridge processor after receiving blood glucosereadings from remote BGM, glucose level trends from remote CGM, and mealcarb content from a bridge user interface (i.e. touch screen). The patchpump may continuously deliver insulin according to CGM glucose readings;receive bolus commands from the bridge device at meals, or both. Thepatch pump may include: 1) a reusable part (RP) that may comprise one ormore of a battery, actuation module having a driving rod (“rod”) andelectronic module, 2) a disposable part (DP) that may comprise one ormore of a first reservoir, a second reservoir (“doser”), an exit port,3) a disposable cradle/cannula/inserter assembly, and 4) a charger. Thepatch pump may be ready for insulin delivery after filling thereservoir, connecting the RP and the DP, and air purging (priming).After cannula insertion and cradle adhesion to skin, the patch may beconnected to cradle and may be disconnected and reconnected at thepatient's discretion. When the patch pump is disconnected the reservoirmay be refilled and the RP may be replaced by a second RP having acharged battery. The pumping mechanism may comprise a first reservoirhaving a first plunger, a second reservoir (doser) having a secondplunger, a first conduit connecting first and second reservoir, a secondconduit connecting second reservoir and an exit port, and the exit port.The second reservoir may be linearly displaced relative to the firstreservoir by linear displacement of the second plunger by the actuationmodule and driving rod. When the second plunger is displaced in onedirection, the second reservoir is linearly displaced at the same firstdirection and fluid is delivered from first reservoir via first conduitto second reservoir. When second plunger is displaced in the oppositedirection the second reservoir is displaced in the same oppositedirection and fluid is delivered from second the reservoir via secondconduit to exit port.

Some of the advantages of the embodiments of the present disclosureinclude the miniature size of the devices (e.g., conveniently portable),their accuracy and ease of integration. For example, the devices andsystems possess the ability to integrate with closed and open loopdiabetes management systems. Further, they can be utilized for a muchlonger duration of use than can be the case with conventional systems.In addition, the present embodiments disclose methods of removing airbubbles from fluids, a feature that distinguishes these features fromconventional methods and systems. In some embodiments, a portable devicethat contains an insulin reservoir in communication with a subcutaneouscannula and a method for continuous (basal) and on-demand (bolus)delivery of insulin is disclosed. Basal and bolus administration ratesmay contribute to enhanced accuracy for the delivery of insulin. In someembodiments, an ambulatory skin adherable insulin pump (patch pump) thatis substantially smaller, less bulky, thinner and lighter thanpreviously known insulin delivery systems is disclosed. Further, theskin adherable patch pump can be concealable. In some embodiments, thedevice may not have operating buttons and may be remotely controlled. Insome embodiments, the patch pump comprises a reusable part and adisposable part. The reusable part can include most or all relativelyexpensive components including plunger threaded rod, battery, drivingmechanism and electronics. Further, the patch pump can be waterproof andallow for pressure equilibrium between surrounding environment andreservoir. In addition, the patch pump can be controlled with a varietyof consumer electronic devices that may be used by the patient such assmartphone, smart-watch, tablet, or PC.

In some embodiments, a portable fluid infusion device comprises a firstreservoir; a second reservoir including a plunger and a hollow needle,the hollow needle configured to allow flow of fluid into and/or out ofthe second reservoir; a dual chamber assembly comprising a first chambercompartment and a second chamber compartment; an exit port; a firstconduit configured to communicate fluid between the first reservoir andthe first chamber compartment of the dual chamber assembly; and a secondconduit configured to communicate fluid between the exit port and thesecond chamber compartment of the dual chamber assembly; wherein a tipor an opening of the hollow needle is configured to transition from thesecond chamber compartment to the first chamber compartment upondisplacement of the second reservoir in a first direction and from thefirst chamber compartment to the second chamber compartment upondisplacement of the second reservoir in a direction opposite to thefirst direction.

In some embodiments, the first reservoir further comprises a fillingport for receiving fluid into the first reservoir. The first reservoirmay also be configured as a prefilled replaceable reservoir. Inaddition, the first reservoir comprises a second plunger configured totransition between two ends of the first reservoir in the firstdirection and/or in the direction opposite to the first direction,wherein the advancement of the second plunger in the direction oppositeto the first direction causes fluid flow from the first reservoir to thesecond reservoir.

In some embodiments, the portable fluid infusion device furthercomprises an electronic module and an actuation module for operating thedisplacement of the plunger in the first and/or opposite to the firstdirections, wherein the electronics module comprises a power source, aprocessor, a transceiver, a buzzer, and/or a sensor, and wherein thesensor includes one or more of a motion sensor, a power source levelsensor, air bubble sensor, revolution sensor, occlusion sensor,reservoir level sensor, second reservoir motion sensor, second reservoirposition sensor, and/or plunger position sensor. Further, the actuationmodule comprises an actuator and a rod, the rod configured to operablycouple to the plunger to drive the displacement of the plunger and/orthe second reservoir. The actuation module further comprises a rodcoupling means coupled to the rod and a plunger coupling means coupledto the plunger; wherein a connection between the rod coupling means andthe plunger coupling means allows the rod to operably couple to theplunger; wherein the connection between the rod coupling means and theplunger coupling means is mechanical and/or magnetic; and wherein distalend of the first reservoir aligns with or extends beyond distal end ofthe rod upon maximum displacement of the plunger in the first direction.

In some embodiments, the portable fluid infusion device furthercomprises a first stopper configured to block a proximal end of thesecond reservoir upon the displacement of the second reservoir in thefirst direction; and a second stopper configured to block a distal endof the second reservoir upon the displacement of the second reservoir inthe direction opposite to the first direction. In some embodiments, thehollow needle is rigidly coupled to the second reservoir. In someembodiments, a displacement of the plunger in the first direction isconfigured to causes fluid flow from the first reservoir to the firstchamber compartment via the first conduit, and displacement of theplunger opposite to the first direction is configured to causes fluidflow from the second reservoir to the exit port via the second conduit,wherein the plunger and the second reservoir are operably coupled so asto cause displacement of the second reservoir in a same direction asdirection of displacement of the plunger until one of the first stopperand the second stopper blocks the second reservoir.

In some embodiments, a portable fluid infusion device comprises adisposable part (DP) comprising a first reservoir and a secondreservoir, the second reservoir having a length which is less than orequal to the length of the first reservoir; and a reusable part (RP)comprising: a first compartment configured to receive the firstreservoir; a second compartment configured to receive the secondreservoir; and a gasket for sealing a junction between the secondreservoir and the second compartment upon connection of the RP and theDP. Further, the portable fluid infusion device comprises a ventconfigured to vent the first compartment, wherein the vent comprises anaperture arranged on the device to vent the first compartment. Inaddition, the vent may be configured to operate upon connection of theRP and the DP. In some embodiments, after connection of the RP and theDP, the second compartment is sealed and the first compartment isvented.

In some embodiments, the RP includes a rigid housing, wherein afterconnection of the RP and the DP, at least one of the first reservoir andthe second reservoir are not in contact with the housing. In someembodiments, after connection of the RP and the DP, the first reservoirand the second reservoir do not contact with the housing. In someembodiments, the portable fluid infusion device further comprises awater resistant member arranged between the RP and the DP and configuredto allow air to pass through the member and substantially restrict orprevent the passage of liquid, wherein the first compartment includes anon-round opening for allowing the reception of the first reservoir intothe first compartment, and/or the second compartment includes a roundopening for allowing the reception of the second reservoir into thesecond compartment. In some embodiments, maximal height of the secondreservoir is about equal to maximal height of the first reservoir. Insome embodiments, the first reservoir includes a filling port forreceiving fluid into the first reservoir, wherein the filling portcomprises an opening punctured from a silicone membrane of a shell ofthe first reservoir. In some embodiments, the first reservoir isconfigured as a prefilled replaceable reservoir.

It should be appreciated that all combinations of the foregoing conceptsand additional concepts discussed in greater detail below (provided suchconcepts are not mutually inconsistent) are contemplated as being partof the inventive subject matter disclosed herein. In particular, allcombinations of claimed subject matter appearing at the end of thisdisclosure are contemplated as being part of the inventive subjectmatter disclosed herein. It should also be appreciated that terminologyexplicitly employed herein that also may appear in any disclosureincorporated by reference should be accorded a meaning most consistentwith the particular concepts disclosed herein.

BRIEF DESCRIPTION OF THE DRAWINGS

The skilled artisan will understand that the drawings primarily are forillustrative purposes and are not intended to limit the scope of theinventive subject matter described herein. The drawings are notnecessarily to scale; in some instances, various aspects of theinventive subject matter disclosed herein may be shown exaggerated orenlarged in the drawings to facilitate an understanding of differentfeatures. In the drawings, like reference characters generally refer tolike features (e.g., functionally similar and/or structurally similarelements).

FIG. 1 shows a scheme of a diabetes management system, according to someembodiments.

FIGS. 2A-B show schemes of a fluid infusion device and infusion siteinterface, respectively, according to some embodiments.

FIG. 3 shows a spatial view of a fluid infusion device, according tosome embodiments.

FIGS. 4A-B shows spatial views of the reusable part (RP) and thedisposable part (DP), according to some embodiments.

FIGS. 5A-B show spatial views before and after connection of thereusable part and the disposable parts, according to some embodiments.

FIG. 6 shows a scheme of the reusable part, according to someembodiments.

FIG. 7 shows a cross section spatial view of the reusable part,according to some embodiments.

FIG. 8 shows an example scheme of the disposable part, according to someembodiments.

FIG. 9 shows a cross section spatial view of the disposable part,according to some embodiments.

FIG. 10 shows a cross-section view of the disposable part base,according to some embodiments.

FIG. 11 shows a scheme of the fluid infusion pump, according to someembodiments.

FIG. 12 shows a cross section spatial view of the pump after connectionof the reusable part and the disposable part, according to someembodiments.

FIG. 13 shows a scheme of the actuation module, according to someembodiments.

FIG. 14 shows spatial views of the electronic module and the actuationmodule, according to some embodiments.

FIGS. 15A-F show a scheme of the pumping mechanism, according to someembodiments.

FIGS. 16A-B show schemes of pumping mechanism, according to someembodiments.

FIGS. 17A-B show schemes of upper and cross section views of the cradle,according to some embodiments.

FIGS. 18A-B show spatial views of the cradle before (A) and after (B)cannula insertion, according to some embodiments.

FIGS. 19A-C show schemes of infusion site interface (e.g., inserter,cradle, and cannula) and insertion mechanism, according to someembodiments.

FIGS. 20A-D show spatial views of infusion site interface (e.g.,inserter, cradle and cannula) and insertion mechanism, according to someembodiments.

FIGS. 21A-F show schematically upside views of device preparation foroperation, according to some embodiments.

FIGS. 22A-D show schemes of the priming process, according to someembodiments.

FIGS. 23A-C show method of battery exchange and reservoir refilling,according to some embodiments.

FIGS. 24A-F show schemes of a method for extension device duration ofuse, according to some embodiments.

FIG. 25 show a scheme of an active valve system, according to someembodiments.

FIGS. 25A and 26A-B show an enlarged scheme of active valve system,according to some embodiments.

FIGS. 27A-F show schemes of pumping mechanism employing the active valvesystem, according to some embodiments.

FIGS. 28A-B show cross section views, including a magnified view (B) ofactive valve system, according to some embodiments.

FIGS. 29A-C show cross section (A and B) and spatial (C) views of activevalve system of FIG. 28, according to some embodiments.

FIGS. 30A-B show schemes of an active valve system, according to someembodiments.

FIG. 31 shows a scheme of pump electronic module and actuation module,according to some embodiments.

FIG. 32 shows a longitudinal cross section scheme of the device,according to some embodiments.

FIGS. 33A-B show schemes of magnetic (A) and mechanical (B) reversibleconnections of driving screw with doser plunger, according to someembodiments.

FIG. 34 shows a scheme of motor operation modes during the variousphases of plunger movement and fluid dispensing, according to someembodiments.

FIGS. 35A-B show a scheme of processes conducted by the patient uponreceiving occlusion warning, according to some embodiments.

FIGS. 36A-B show schemes of end of reservoir sensor, according to someembodiments.

FIG. 37 shows a block diagram of diabetes management system, accordingto some embodiments.

FIG. 38 shows a block diagram of insulin management system, according tosome embodiments.

FIGS. 39A-D shows examples of bridge devices, according to someembodiments.

FIG. 40 shows a schematic diagram of server, according to someembodiments.

FIG. 41 shows a schematic diagram of bridge device, according to someembodiments.

DETAILED DESCRIPTION OF SOME OF THE EMBODIMENTS

With reference to FIG. 1, in some embodiments, a scheme of a diabetesmanagement system 100 is shown. The system includes at least one of thefollowing components: insulin pump 1, continuous glucose monitor (CGM)300, blood glucose monitor (BGM) 400, controller 200, smartphone 500, PC600, and cloud 700. System 100 components may wirelessly communicate intwo way communication (i.e. pump 1—controller 200) or one waycommunication (i.e. pump 1—smartphone 500). Communication protocolscould be, for example, Bluetooth, Bluetooth Low Energy (BLE), or anyother proprietary RF protocol. Pump controller 200 may provide aninterface for the user with pump 1 for commanding basal and bolus dosesand profiles and for receiving alerts and alarms. Communication betweenCGM 300 and pump 1 may provide artificial pancreas (closed loop system)functionality in which insulin doses are automatically administeredaccording to monitored glucose levels of CGM 300. Transmitted readingsfrom BGM 400 and/or CGM 300 to pump controller 200 and/or smartphone 500provide the user with glucose readings for calculating insulin dosing.Real time and stored data from pump 1, pump controller 200, CGM 300, andBGM 400 may be transmitted to smartphone 500 to be presented or stored.Two way cellular communication of smartphone 500 with cloud 700 mayprovide the patient with ability to download personal data stored at aremote server. Data in cloud 700 may be downloaded, processed andtransmitted to and from a PC 600 or a remote smartphone 800.Examples: 1) a glucose reading measured with a child BGM 400 istransmitted to mother's smartphone 800 in real time. 2) Physiciandownloads patient's last month's stored data from cloud 700 to office PC600 (insulin administrations and glucose readings). Accordinglyphysician tailors basal profile setting and sends message to patient'ssmartphone 500.

With reference to FIGS. 2A-B, in some embodiments, schemes of a fluidinfusion device 1 (2 a) (hereinafter “device”) and infusion siteinterface 10 (2 b) are shown. In some embodiments, device 1 may infuse afluid into the body of a patient via a cannula or a needle which is indirect fluid communication with device 1, without external tubing. Thefluid may be a drug such as, for example, a biologic, a hormone, or achemotherapeutic. The hormone may be insulin, or, for example, glucagon.Device 1 may be configured to deliver a fluid according to apredetermined program. Device 1 may also be a component of a system 100in which the device 1 is in wireless communication with one or more ofsystem 100 components—BGM, CGM, pump controller, smartphone or any otherdesignated remote transceiver. FIG. 2 a shows device 1. Device 1 maycomprise a reusable part (RP) 2, a disposable part (DP) 3, a cradle 4,and a cannula 9. RP 2 and DP 3 may be reversibly connected to each otherto form a functioning fluid infusion pump 6. DP 3 may comprise an exitport 7, through which infusion fluid may exit DP 3 on its way into apatient's body. Pump 6 may be reversibly connected to cradle 4 by, forexample, a snap mechanism 8. One side of the cradle (e.g., bottom side)may be connected to a patient's body by means of, for example, anadhesive. FIG. 2b shows the infusion site interface 10. Infusion siteinterface 10 comprises an inserter 5, a cradle 4, and cannula 9. Cradle4 faces the patient's skin and is opposite inserter 5. When infusionsite interface 10 is attached to the patient's skin, cradle 4 adheres toskin by cradle adhesive. Inserter 5 may be used to automatically inserta cannula 9 into the patient's body by pushing button 56. After cannulainsertion, inserter 5 is disposed, cradle 4 remains adhered to skin, andcannula 9 transverse exit port 7 and resides in patient's subcutaneoustissue below the skin.

With reference to FIG. 3, in some embodiments, a spatial view of device1 is shown. Device 1 includes a pump 6 that is comprised of RP 2 and DP3, a cradle 4 with snap 8, and a cannula 9. DP includes a filling port39.

With reference to FIGS. 4A-B, in some embodiments, spatial views of RP 2and DP 3 are shown. RP 2 includes a rigid shell 44 and two openings—ovalopening 30 and round opening 28. DP 3 includes a reservoir 32, a doser33, and a filling port 39.

With reference to FIGS. 5A-B, in some embodiments, spatial views beforeand after connection of RP 2 and DP 3 forming pump 6, respectively, areshown. Oval reservoir 32 and round doser 33 are aligned with openings 30and 28 respectively.

With reference to FIG. 6, in some embodiments, a scheme of RP 2 isshown. RP 2 comprises a shell 44 and a septum 20. Septum 20 separates RP2 into a first compartment 21 and a second compartment 22. Shell 44 isrigid and may be made, for example, from metal or plastic. Firstcompartment 21 contains an electronics module 23 and an actuation module24. Actuation module 24 may comprise an actuator 25 (i.e. motor andgear), a rod 26 (i.e. driving screw), and a rod coupling means 27. Firstcompartment 21 comprises an opening 28 having a circular or roundcross-sectional shape, and a gasket 29 disposed around the circumferenceof opening 29. Gasket 29 seals first compartment 21 in watertightfashion whenever RP 2 and DP 3 are connected. Second compartment 22 hasan opening 30, which may have a non-circular cross-section, such as, forexample, an oval cross-section. When RP 2 and DP 3 are connected,compartment 22 may not be sealed.

With reference to FIG. 7, in some embodiments, a cross section spatialview of RP 2 is shown. RP 2 comprises the rigid shell 44 and the septum20 that divides RP 2 (dashed line) into the sealed compartment 21 andthe non-sealed (“vented”) compartment 22. Non sealed compartment 22 hasthe opening 30 that may have an oval shape, a round shape, or a fourarches shape. Sealed compartment 21 includes opening 28 that has a roundshape. Gasket (not shown) is disposed around the circumference ofopening 28. Compartment 21 may include electronic unit 23, motor 49,gear 50, rod 26, and rod coupling means 27.

With reference to FIG. 8, in some embodiments, a scheme of oneembodiment of DP 3 is shown. DP 3 comprises a base 31, a reservoir 32for storing infusion fluid, a doser 33 for administering the infusionfluid to the patient in accurate fashion, and an exit port 7. Reservoir32 and doser 33 may be rigidly connected to base 31. A first check valve34 may be disposed in base 31 between reservoir 32 and doser 33, suchthat fluid flow is possible only from reservoir 32 to doser 33 but notin the opposite direction. A second check valve 35 may be disposed inbase 31 between doser 33 and exit port 7, such that fluid flow ispossible only from doser 33 to exit port 7 but not in the oppositedirection. Reservoir 32 may comprise a filling port 39 and a reservoirplunger 36 configured to advance from a first open end 37 of reservoir32 to a second closed end 38 of reservoir 32. Plunger 36 may alsoadvance from second reservoir end 38 to first reservoir end 37. Fillingport 39 may comprise a thin membrane (i.e. a silicone membrane) that maybe punctured using a needle and self-resealed upon needle retraction.Doser 33 may comprise a doser plunger 40 configured to advance from afirst open end 42 of doser 33 to a second end 43 of doser 33. Doserplunger 40 may also be advanced from second end 43 to first end 42.Doser plunger 40 may be fitted with a plunger coupling means 41. Theend-to-end length of doser 33 may be smaller than the end-to-end lengthof reservoir 32. More specifically, the length of doser 33 may be lessthan or equal to approximately one half of the length of reservoir 32.The diameter of doser 33 may be less than 8 mm. More specifically, thediameter of doser 33 may be less than about 5 mm.

With reference to FIG. 9, in some embodiments, a cross section spatialview of DP 3 is shown. DP 3 includes base 31, exit port 7, reservoir 32and doser 33. Reservoir 32 includes plunger 36 and filling port 39.Doser 33 includes doser plunger 40. Plunger 36 and doser plunger 40 maymove in both directions between first (open) ends 37 and 42 and secondends 38 and 43, respectively.

With reference to FIG. 10, in some embodiments, a cross-section view ofDP base 31 taken at plane A-A of FIG. 8 is shown. The cross section ofdoser 33 may be circular, thereby allowing for a watertight seal withgasket 29 of RP 2. The cross section of reservoir 32 may benon-circular, for example, elliptical, oblong, or oval, thereby allowingthe reservoir to hold a suitable volume of infusion fluid whilemaintaining the z dimension (thickness) of pump 6 thin. In someembodiments of the present disclosure pump 6 may be less than 10 mmthick, or even less than 8 mm thick, or even less than 6 mm thick.

With reference to FIG. 11, in some embodiments, a scheme of pump 6 isshown. Pump 6 is obtained by reversibly connecting RP 2 and DP 3.Whenever RP 2 and DP 3 are connected to form pump 6, second reservoir(or “doser”) 33 is received within first compartment 21 of RP 2, andfirst reservoir 32 (or “reservoir”) may be received within secondcompartment 22 of RP 2. Septum 20 may provide a complete sealedseparation between the two compartments. Gasket 29, which may besituated at opening 28 of RP 2 may form a watertight seal around doser33, thereby allowing for watertight sealing of compartment 21 of pump 6.Water and moisture may thus be kept away from all components situated incompartment 21, including electronics module 23 and actuation module 24.Interface 43 between compartment 22 and DP 3 may or may not accommodatea watertight seal. In some embodiments of the present disclosure, asemipermeable seal is disposed on interface 43, which prevents dirt fromentering compartment 22 but allows air to communicate freely between thecompartment and the exterior environment. This may allow for pressureequilibration between compartment 22 and the surrounding atmosphere. Inanother embodiment, pressure equilibration may be achieved with a smallopening 70 in shell 44. In some embodiments, reservoir 32 withincompartment 22 is not touching shell 44. Thus, shell 44 providesreservoir 32 protection against compression by external forces andsubsequent unintentional release of infusion fluid from reservoir 32.Whenever RP 2 and DP 3 are connected to form pump 6, rod 26 and doserplunger 40 may be engaged. Engagement may be achieved by means of areversible connection between rod coupling means 27 and doser plungercoupling means 41. In some embodiments of the present disclosure, rodcoupling means 27 may comprise a magnet having a certain polarity and aplunger coupling means 41 may have the opposite polarity. In someembodiment of the present disclosure, coupling means 27 and 41 may be a“male-female” engagement mechanism such as snap mechanism or any otherknown in art engagement mechanism. Once coupling means 27 and 41 areconnected, linear movement of rod 26 causes doser plunger 40 to make acorresponding linear motion. Detailed description of coupling mechanismsis shown in FIG. 33.

With reference to FIG. 12, in some embodiments, a cross section spatialview of pump 6 after connection of RP 2 and DP 3 is shown. Doser 33 andreservoir 32 are received within sealed compartment 21 and ventedcompartment 22 of RP 2 respectively. Doser 33 and reservoir 32 areprotected from outside pressure by rigid shell 44. Septum 20 provides acomplete sealed separation between the two compartments (dashed line).Sealing of compartment 21 is achieved with gasket 29. Sealed compartment21 includes electronics module 23, motor 49, gear 50, rod 26, andcoupling means 27. After connection of DP 3 and RP 2, rod coupling means27 and plunger coupling means (not shown) are engaged.

With reference to FIG. 13, in some embodiments, a scheme of actuationmodule 24 is shown. Actuation module 24 may comprise motor 49, 1^(st)gear 50, rotatable nut 51 (hereinafter “nut”), rod 26, and rod couplingmeans 27. Motor 49 may be an electrical motor. In some embodiments ofthe present disclosure motor 49 may be of the following types: a DCmotor, a universal motor, an AC motor, a stepper motor, a permanentmagnet motor, a brushed DC motor, a brushless DC motor, a switchedreluctance motor, a coreless DC motor, a printed armature or pancake DCmotor, an AC motor with sliding rotor, a synchronous electric motor, aninduction motor, a doubly fed electric motor, a singly fed electricmotor, and a torque motor. Gear 50 may be, for example, a planetary gearsystem configured to translate a rotational output of motor 49 into alinear motion of rod 26. In some embodiments of the present disclosure,gear 50 may comprise a rotatable nut 51. Nut 51 may be threaded, and rod26 may be counter-threaded with respect to nut 51. Gear 50 may translatea rotational output provided by motor 49 into rotational motion of nut51, which is then transmitted by the nut's thread to the rod'scounter-thread thereby causing the rod to move forward or backward inthe direction of the rod's axis.

With reference to FIG. 14, in some embodiments, spatial view ofelectronic module 23 and actuation module 24 is shown. Electronic moduleincludes printed circuit board (PCB) 91 and battery 45. PCB compriseshardware and software components. Actuation module includes motor 49,gear 50, nut 51, rod 26, rod coupling means 27, and a revolution sensor81.

With reference to FIG. 15, in some embodiments, a scheme of pumpingmechanism of pump 6 is shown. This configuration comprises two openingsin reservoir 32, two openings in doser 33, and two check valves 34 and35. For ease of understanding, only those components of the pump thatcome in contact with the infusion fluid are depicted. FIG. 15a shows theinitial state of the pumping mechanism, before it is filled withinfusion fluid. Reservoir plunger 36 is situated near second reservoirend 38, with filling port 39 disposed between plunger 36 and end 38.Doser plunger 40 is situated near second doser end 43. Doser plunger 40seals the opening (not shown) through which fluid communication isestablished between first check valve 34 and the interior of doser 33.FIG. 15b shows the state of the pumping mechanism immediately afterreservoir 32 is filled with infusion fluid. Infusion fluid is injectedinto reservoir 32 through port 39 using, for example, a syringe. Theinfusion fluid is prevented from entering doser 33 by means of plunger40 interrupting fluid communication between check valve 34 and theinterior of doser 33. Thus, the infusion fluid fills reservoir 32,displacing plunger 36 in the direction of first opening 37 of reservoir32. Filling concludes when, for example, plunger 36 reaches a stopper(not shown) situated near opening 37. FIG. 15c shows the state of thepumping mechanism immediately after doser plunger 40 reaches a positionclosest to first doser opening 42 after moving in the direction of firstdoser opening 42. (Movement of plunger 40 is caused by rod 26, which isnot shown). The movement of plunger 40 towards end 42 causes fluid fromreservoir 32 to flow into doser 33 through check valve 34, therebyfilling doser 33. Note that fluid flow from exit port 7 into doser 33 isprevented by check valve 35. In transition between the states depictedin FIGS. 15b and 15c , the volume of fluid entering the doser 33 issubstantially equal to the volume of fluid lost by the reservoir 32.Thus, reservoir plunger 36 moves in the direction of end 38 a distanceequal to the doser volume divided by the cross sectional area of thereservoir 32. FIG. 15d shows the state of the pumping mechanismimmediately after doser plunger 40 reaches its initial position nearsecond end 43 of doser 33 once again. The movement of plunger 40displaces the infusion fluid contained within doser 33 towards exit port7 through second check valve 35. The fluid is prevented from flowingback into reservoir 32 by check valve 34. FIG. 15e shows the state ofthe pumping mechanism immediately after doser plunger 40 reaches yetagain its position closest to first end 42 of doser 33. Upon reachingthe position, the doser is refilled by infusion fluid flowing into itfrom reservoir 32 through check valve 34. Fluid residing between thedoser and exit port 7 is prevented from re-entering the doser by meansof check valve 35 FIG. 8f shows the state of the pump immediately afterdoser plunger 40 has cycled as many times as required between its twoextreme positions to empty all of the infusion fluid in reservoir 32through exit port 7. The pump has thus returned to its initial positionas depicted in FIG. 15a , except that exit port 7 may not be completelyempty of infusion fluid. Note that doser plunger 40 need not reacheither of its extreme positions in order to displace fluid from thereservoir through the exit port. In some embodiments, the plunger 40 maybe displaced by any amount. Plunger 40 may be displaced according to apredetermined program stored, for example, on a microprocessor in orderto provide a predetermined infusion profile.

With reference to FIGS. 16A-B, in some embodiments, pumping mechanismschemes are shown. The pumping mechanism of pump 6 is advantageous interms of both size and accuracy, discussed in more details below.

Size: Total pump length may be approximately the same as the reservoirlength. This is because the combined length of doser 33 and rod 26 isroughly equal to the length of reservoir 32. In conventional syringepumps, in which the doser and the reservoir are one and the same, thepump length needs to be greater than or equal to the combined lengths ofthe reservoir and a plunger rod. Thus, in some embodiments of thepresent disclosure the length of the pump may be less than or equal toone half the length of an equivalent conventional syringe pump.

Accuracy: Dosing may be much more accurate in some embodiments of thepresent disclosure than in an equivalent conventional syringe pump. Thisis because the cross sectional area of the doser 33 (denoted a) may be10-100 times smaller than the cross sectional area A of the reservoir32. Thus, in a conventional syringe pump a plunger displacement error dtranslates into a volume displacement error d*A (assuming that the crosssectional area of a conventional syringe pump is similar to the crosssectional area A of reservoir 32.). In some embodiments according to thepresent disclosure, the same plunger displacement error d wouldtranslate into a volume displacement error d*a, which is 10-100 smallerthan in conventional syringe pumps.

With reference to FIGS. 17A-B, in some embodiments, schemes of upperview 17 a and cross section view 17 b of cradle 4 are shown. In someembodiments, cradle 4 comprises a frame 52 and a bottom side 53 (FIG.17b ). In some embodiments according to the present disclosure, frame 52may have a cross-sectional area that is square, rectangular or slightlycurved (FIG. 17b ). The curved shape is configured to complement thecross-sectional curved shape of pump 6 (FIG. 3), thereby allowing thepump to fit into the cradle without increasing the thickness of theoverall structure beyond the thickness of pump 6. Frame 52 may be rigidor flexible to accommodate strains caused by skin movement. Bottom side53 of cradle 52 may be made of adhesive paper and protection liner to beremoved before use. In some embodiments, bottom side 53 may comprise anopening 54 configured to receive exit port 7 and a cannula 9. Opening 54may allow the patient to visually inspect skin in the close vicinity ofcannula 9 for bleeding or irritation. In some embodiments of the presentdisclosure reversible connection between pump 6 and cradle 4 may beimplemented using a snap mechanism 8.

With reference to FIGS. 18A-B, in some embodiments, spatial views ofcradle 4 before (18 a) and after (18 b) cannula insertion are shown. Insome embodiments, cradle 4 comprises frame 52, bottom side (i.e.adhesive) 53, exit port 7, and snap mechanism 8. After insertion,cannula 9 is received within exit port 7.

With reference to FIGS. 19A-C, in some embodiments, schemes of infusionsite interface 10 are shown. Infusion site interface comprises a cannulainserter 5, cradle 4, and cannula 9. FIG. 19a shows infusion siteinterface 10 with inserter 5 in the un-deployed state. Inserter 5comprises cannula 9, spring 55, and spring release button 56. Cannula 9may comprise a sharp penetrating member 57 and an extra-cutaneous member58. Member 58 may be comprised of a flexible septum (i.e. silicone)disposed at its top end. To deploy cannula 9 into the patient's body,infusion site interface 10 is attached to patient skin 80 and cradle 4is adhered to skin 80. FIGS. 19b and 19c show the insertion process.Upon pressing button 56, spring 55 is released and shoots penetratingmember 57 and cannula 9 into the skin 80. Subsequently, penetratingmember 57 is retracted, maintaining cannula 9 within the body and member58 external to the skin (FIG. 19c ). Finally, inserter 5 includingpenetrating member 57 is disposed (not shown) and cradle 4 remainsadhered to skin.

With reference to FIGS. 20A-D, in some embodiments, spatial views ofinfusion site interface 10 are shown. Infusion site interface 10comprises inserter 5, cannula 9, and cradle 4. In some embodiments,infusion site interface 10 is a disposable assembly that is preassembledwith cannula 9 and cradle 4 at a sterile blister (not shown). Afterremoval from blister and liner peeling of adhesive from cradle bottomside 53, the infusion site interface is attached to patient's skin at adesired location. Upon pressing button 56, cannula 9 is automaticallyinserted and subsequently, penetrating member 57 is retracted. FIG. 20aand FIG. 20b (cross section) show the infusion site interface 10 beforeinsertion of cannula 9 by inserter 5. FIGS. 20c and 20d (cross sections)show insertion of cannula 9 and retraction of penetrating member 57while maintaining member 58 above cradle frame 52. After insertion,cradle 4 is attached to skin and cannula 9 resides in the subcutaneoustissue below the skin.

With reference to FIGS. 21A-F, in some embodiments, schematic upsideviews of device 1 preparation for operation are shown. First, the userextracts DP 3 from a sterile package (not shown) in its initial state(FIG. 21a ). The user then fills reservoir 32 with infusible fluidthrough filling port 39 using a syringe configured with a needle (notshown). Once the reservoir is filled to the extent required by the user,the syringe needle is withdrawn from filling port 39 and the septumdisposed therein self-seals. The situation is now shown in FIG. 21b . Inthe next step RP 2 and DP 3 are connected to form a pump 6 (FIG. 21c )and priming (air purging) is performed (detailed in FIG. 22). FIG. 21dshows the infusion site interface that comprises inserter 5 withoperating button 56 and cradle 4. After cannula 9 insertion, inserter 5is removed from cradle 4 (FIG. 21e ), frame 52 is connected to adhesive53 and cannula 9 resides within exit port 7. Finally (FIG. 210, pump 6is connected to cradle 4 and device 1 is ready to go. Connection of pump6 to cradle 4 provides fluid communication between pump 6 and cannula 9and fluid can be delivered from doser 33 to body. Connection of pump 6and cradle 4 is reversible (curved arrows), thus patient can refillreservoir or replace RP (i.e. low battery) upon his/her discretion(detailed in FIG. 23).

With reference to FIGS. 22A-D, in some embodiments, schemes of thepriming process are shown. FIG. 22a shows reservoir 32 filling withexternal syringe. Patient holds DP 3 and aligns the syringe needle withopening 39. During fluid movement from syringe to reservoir, air bubblesare formed and randomly spread within reservoir 32. Next, the patientconnects RP 2 and DP 3 and holds pump 6 in an upright position (FIG. 22b). In this position, air bubbles are gathered at the upper side ofreservoir 32. Next, the patient operates pump 6 in a “priming mode”(i.e. command with remote controller). At the priming mode, theoperation of the motor (not shown) automatically drives rod 26 and doserplunger 40 backward and forward at a pre-programmed sequence (ormanually upon patient's discretion). The next priming step is shown inFIG. 22c . Doser 33 pumps fluid and bubbles from the upper part ofreservoir 32 (second reservoir end 38) into the upper part of doser 33(doser plunger 40 moves backward). Finally, fluid with bubbles isdischarged from doser 33 into exit port 7 and further away dripsexternally (doser plunger 40 moves forward). The priming process may berepeated as much as needed until air bubbles are not seen. In someembodiments of the present disclosure, once the user visually inspectssteady fluid flow through exit port 7 the pump may be instructed to endthe priming sequence. RP 3 and reservoir 32 may be made of translucentplastic in order to make air bubbles visible. Sensors disposed betweendoser 33 and exit port 7 may also detect the presence or absence ofbubbles (detailed in FIG. 31), and transmit a priming terminationsequence whenever the absence of bubbles is detected. Once thetermination sequence is ended, pump 6 is ready to use.

With reference to FIGS. 23A-C, in some embodiments, a method of batteryexchange and reservoir refilling is shown. According to some embodimentsof the present invention, duration use of the device may be extended atthe patient's discretion while maintaining the small size of the device.In addition to increased patient comfort, this configuration saves moneybecause less single-use pieces are disposed. Diabetes patients usingdurable (pager) or patch insulin pumps usually replace the infusion setor the entire pump every 2-3 day. There are mainly two parameters thatlimit the duration of pump use—the volume of the reservoir (amount ofinsulin units) and battery life time. Extension of pump operation timerequires large reservoir and large battery, both of which enlarge pumpvolume. Device 1 is small and may be used for many days because thereservoir may be refilled and the battery may be replaced. Thusreservoir and battery volumes may be minimal. Patients may decide ifthey want to refill the reservoir, replace the battery or concomitantlydo both. For example, in a current patch pump, the reservoir volume is200 U and battery life time is 3 days. If the patient's total daily dose(TTD) is 100 units (U) then the patch pump should be replaced every 2days (end of reservoir volume limitation). If the patient's TTD is 50 Uthen the patch pump should be replaced every 3 days (end of battery lifelimitation). In device 1, for example, reservoir volume is 100 U andbattery life time is 1 day (smaller volumes than current pump), patientrefills reservoir and replaces battery every 1 day as long as he/shewishes (for example, 1 week).

FIG. 23a shows pump 6 that comprise RP 2 (A) and DP 3. Battery 45resides within RP 2. In this example, reservoir 32 is almost empty andshould be refilled. Meanwhile, battery 45 of a second RP 2 (B) is beingcharge by inductive charger 101. When reservoir 32 is almost empty(patient receives “low reservoir” alert), the patient disconnects pump 6from cradle and then disconnects RP 2 (A) from DP 3 (not shown). FIG.23b shows refilling of reservoir 32 of DP 3 with external syringe. Afterreservoir 32 is filled, the patient reconnects DP 3 and a second RP 2(B) that comprises the charged battery 45. Pump 6 is ready for anothercycle of use (FIG. 23c ). Battery 45 of first RP 2 (A) may then berecharged by charger 101 to be ready for the next cycle of use.

With reference to FIGS. 24A-F, in some embodiments, schemes of a methodfor extending the device's duration of use are shown. In this embodimentthe reservoir is prefilled (by patient or manufacturer). The emptyreservoir is replaced by a prefilled reservoir and the pump may be usedagain until the replaceable reservoir is empty. FIG. 24a shows device 6that comprises RP 2 and DP 3. Reservoir 32 is reversibly disposed withinDP 3. In this example, reservoir 32 and doser 33 are empty and thepatient receives “end of reservoir” alert. Patient disconnects pump 6from cradle (not shown) and disconnect RP 2 from DP 3 (not shown). FIG.24b shows DP 3 that comprises empty reservoir 32. FIG. 24c shows DP 3after removal of detachable reservoir. FIG. 24d shows a few prefilledreservoirs 32. These reservoirs may be filled by the patient in advanceand can be stored in a refrigerator. Alternatively the reservoirs may befilled by the manufacturer as prefilled cartridges (vial). Reservoirsmay be made of polymer (plastic) or glass. FIG. 24e shows DP 3 withprefilled reservoir 32 reassembled in DP 3. At the final step (FIG. 24f), the patient connects DP 3 (with filled reservoir) with RP 2 (battery45 recharged), and pump 6 is ready for another cycle of use.

With reference to FIG. 25, in some embodiments, a scheme of an activevalve system 61 is shown. In this embodiment doser 33 is floating(hereinafter “floating doser” 33) and may be moved forward and backwarddue to friction force between doser plunger 40 and floating doser 33. RP2 is connected with DP 3 and rod 26 is coupled with doser plunger 40 bycoupling means 27 and 41. Doser 33 resides within RP 2 and gasket 29provides sealing of compartment 22. Doser plunger 40 moves forward orbackward according to forward or backward linear movement of rod 26.Doser 33 may linearly move forward and backward (double arrow)relatively to gasket 29. DP 3 comprises base 31, reservoir 32, reservoirplunger 36, doser 33, active valve system 61, conduits 66 and 67, andexit port 7. Doser 33 comprises plunger 40, plunger coupling means 41,and sliding needle port 59 which is a hollow needle disposed at thedistal end of doser 33 and provides an exit port of fluid from doser(hereinafter a “sliding needle”). Active valve system 61 is rigidlyconnected to base 31. Active valve system 61 comprises first conduit 66,second conduit 67, and dual chamber 68. Dual chamber 68 comprises firstseptum 64, first chamber 62, second septum 65, and second chamber 63.Conduit 66 establishes fluid communication between reservoir 32 andfirst chamber 62. Second conduit 67 establishes fluid communicationbetween second chamber 63 and exit port 7. Both first septum 64 andsecond septum 65 are configured to prevent fluid leakage when puncturedby sliding needle 59. Both first septum 64 and second septum 65self-seal upon needle withdrawal from septum puncture site. First septum64 and second septum 65 may each be made, for example, of a plastic,such as silicone.

FIG. 25a (1-2) shows an enlarged scheme of an example embodimentdepicted in dotted circle of FIG. 25. DP 3 includes base 31 andcylindrical extension 31′, doser 33, doser plunger 40 and sliding needle59. RP 2 includes gasket 29. Doser 33 freely moves within cylinder 31′(directions of arrow). When RP 2 is connected with DP 3, cylinder 31′transverses gasket 29 and the tight junction between cylinder 31′ andgasket 29 provides sealing of RP2 sealed compartment 21. When plunger 40moves forward or backward, doser 33 freely follows the direction ofmovement because the friction between doser 33 and doser plunger 40 ismuch higher that the friction between doser 33 and cylinder 31′. FIG.25b (2) shows a cross section view of plan X-X of FIG. 25a (1). Gasket29 tightly encircles cylinder 31′ and doser 33 may freely move backwardand forward within cylinder 31′.

With reference to FIGS. 26A-B, in some embodiments, an enlarged schemeof active valve system 61 is shown. Active valve system 61 includes dualchamber 68 that comprises first septum 64, first chamber 62, secondseptum 65, second chamber 63, conduits 66 and 67, and exit port 7.Floating doser 33 may move linearly forward and backwards (arrows)between stopper 86 (rigidly connected to RP) and stopper 85 (rigidlyconnected to DP). Floating doser 33 is rigidly connected to slidingneedle 59. FIG. 26a shows the active valve system during backward motionof rod 26 and doser plunger 40 (toward the left, as shown by arrow). Dueto friction force between floating doser 33 and doser plunger 40,floating doser 33 moves backward (left), relatively to gasket 29, frommaximal forward position at stopper 85 (dotted line) to maximal backwardposition at stopper 86. During backward motion of floating doser 33,sliding needle 59 moves backward and tip of sliding needle 591 movesfrom second chamber 63 (dashed needle) to first chamber 62. During thisphase, plunger 40 and floating doser are temporarily fixed and aremoving together (e.g., little or no relative motion between floatingdoser 33 and plunger 40). When floating doser 33 touches stopper 86,there is no more relative motion between floating doser 33 and gasket29, at that point, continuous backward motion of plunger 40 sucks fluidfrom reservoir 32 (not shown) through conduit 66 into first chamber 62and floating doser 33 is filled. FIG. 26b shows the active valve systemduring forward motion of rod 26 and doser plunger 40 (toward the right,as shown by arrow). Floating doser 33 moves forward (right) relativelyto gasket 29, from maximal backward position at stopper 86 (dotted line)to maximal forward position at stopper 85. During forward motion offloating doser 33, sliding needle 59 moves forward and tip of slidingneedle 591 moves from first chamber 62 to second chamber 63. During thisphase, plunger 40 and floating doser 33 are temporarily fixed to eachother and are moving together (e.g., little or no relative motionbetween floating doser 33 and plunger 40). When floating doser 33touches stopper 85, there is no more relative motion between floatingdoser 33 and gasket 29. At that point, continuous forward motion ofplunger 40 pushes fluid from doser 33 through conduit 67 into exit port7.

With reference to FIGS. 27A-F, in some embodiments, schemes of a pumpingmechanism employing an active valve system are shown. For ease ofunderstanding, only those components of the pumping mechanism that comein contact with the infusion fluid are depicted. FIG. 27a shows theinitial state of the pumping mechanism before reservoir 32 is filledwith infusion fluid. Reservoir plunger 36 is situated near secondreservoir end 38, with filling port 39 disposed between plunger 36 andend 38. Doser plunger 40 is situated near second doser end 43. Secondend of floating doser 33 is in physical contact with stopper 85. The tipof sliding needle 59 is situated in second chamber 63. FIG. 27b showsthe state of pumping mechanism immediately after reservoir 32 is filledwith infusion fluid. Infusion fluid is injected into reservoir 32through filling port 39 using, for example, a syringe. The infusionfluid fills reservoir 32, displacing plunger 36 in the direction offirst opening 37 of reservoir 32. The fluid may also fill first chamber62 through first conduit 66. Fluid is prevented from flowing from firstchamber 62 to second chamber 63 (and beyond) by septum 65. Fillingconcludes when, for example, plunger 36 reaches a stopper (not shown)situated near opening 37. FIG. 27c shows the state of pump mechanismwhen motor (not shown) is operated and rod 26 linearly moves in backwarddirection (to the left as shown by arrow). During this phase, floatingdoser 33 moves backward (left) with little or no relative motion betweenfloating doser 33 and plunger 40. At the end of this phase first end ofdoser 42 is in physical contact with stopper 86 and sliding needle tipis situated in first chamber 62. FIG. 27d shows the state of the pumpingmechanism when rod 26 and plunger 40 are moving backward (left as shownby arrow) and first chamber 62 and doser 33 are filling with fluid.During this phase, floating doser 33 is not moving and there is arelative motion between plunger 40 and doser 33. FIG. 27e shows thestate of the pumping mechanism when motor (not shown) rotation isreversed and rod 26 linearly moves forward (to the right as shown byarrow). During this phase, floating doser 33 moves forward (right) withlittle or no relative motion between floating doser 33 and plunger 40.At the end of this phase second end of doser 43 is in physical contactwith stopper 85 and sliding needle tip is situated in second chamber 63.FIG. 27f shows the state of the pumping mechanism when rod 26 andplunger 40 are moving forward (to the right, as shown by arrow) andfluid is delivered through second chamber 63 and conduit 67 into exitport 7. During this phase, floating doser 33 is not moving and there isa relative motion between plunger 40 and floating doser 33.

With reference to FIGS. 28A-B, in some embodiments, cross sectionalviews of an active valve system are shown. In this configuration, dualchamber 68 is positioned side by side with floating doser 33 and slidingneedle 59 is curved. Dual chamber 68 is rigidly connected to base 31 andcomprises first chamber 62 and second chamber 63. Conduit 66 ishydraulically connected with reservoir 32 and first chamber 62. Conduit67 is hydraulically connected with second chamber 63 and exit port 7.Floating chamber 33 can move forward and backward (up and down, as shownby double arrow) relatively to base 31 and gasket 29. Sliding needle 59is curved and hydraulically connected with floating doser 33 and secondchamber 63. Upon backward and forward linear movement of plunger 40(directions of arrow), floating doser 33 and sliding needle 59 aremoving in the same direction of plunger 40. Accordingly, sliding needletip moves forward or backward in the same direction of floating doser 33and convertibly resides in first chamber 62 or in second chamber 63.

With reference to FIGS. 29A-C, in some embodiments, cross sectional (29a-b) and spatial (29 c) views of the active valve system of FIG. 28 areshown. Dual chamber 68 is rigidly connected to base 31 and comprisesfirst chamber 62 and second chamber 63. Conduit 66 is hydraulicallyconnected with reservoir 32 and first chamber 62. Conduit 67 ishydraulically connected with second chamber 63 and exit port (notshown). FIG. 29a and FIG. 29b show the two optional positions of slidingneedle tip 591. In FIG. 29a tip 591 resides in first chamber 62 and inFIG. 29b tip 591 resides in second chamber 63. FIG. 29c shows a floatingdoser 33 that linearly moves (direction of double arrow) in relativemotion to base 31 and gasket 29. Accordingly sliding needle 59 linearlymoves in relative motion to dual chamber 68.

With reference to FIGS. 30A-B, in some embodiments, schemes of someembodiments of an active valve system are shown. In this configuration,floating doser 33 has two openings 74 and 76 (unlike one opening shownin configuration of FIG. 28). DP 3 comprises base 31, reservoir 32,floating doser 33, cylinder 79, conduits 66 and 67, and exit port 7.Floating doser 33 includes two openings 74 and 76, and cylinder 79includes two openings 77 and 78. Floating doser 33 may move linearly(forward and backward in the direction of arrows) within cylinder 79according to the direction of movement of plunger 40 and rod 26 (due tofriction forces between plunger 40 and doser 33). The concept of thepumping mechanism is similar to FIG. 15, a backward motion of plunger 40pumps fluid from reservoir 32 and fills doser 33 and a forward motion ofplunger 40 dispenses fluid from doser 33 to exit port 7. FIG. 30a showsthe process of doser 33 filling. Initially, backward movement (to theleft, as shown by arrow) of floating doser 33 aligns opening 76 andopening 77 (opening 74 is closed). When doser end 42 touches stopper 86,further backward movement of plunger 40 pumps fluid from reservoir 32into doser 33. FIG. 30b shows the process of fluid dispensing from doser33. Initially, forward (to the right, as shown by arrow) movement offloating doser 33 aligns opening 74 and opening 78 (opening 74 isclosed). When doser 33 touches cylinder 79, further forward movement ofplunger 40 dispenses fluid from doser 33 into exit port 7. Subsequently,when doser 33 is empty, plunger 40 moves backward and another cycle ofdoser filling is initiated.

With reference to FIG. 31, in some embodiments, a scheme of electronicmodule 23 and actuation module 24 of pump 6 is shown. Pump 6 comprisesRP 2 and DP 3. RP 2 comprises a shell 44 and a septum 20 that divides RP2 into two separate compartments, sealed compartment 21 and ventedcompartment 22. Septum 20 and shell 44 may be partially or totallytransparent. In some embodiments, septum 20 and shell wall facing DP 44′include transparent windows providing line of site between sealedcompartment 21 and reservoir 32, and between sealed compartment 21 andDP 3. DP 3 comprises reservoir 32, reservoir plunger 36, doser 33, doserplunger 40, conduit 67 and exit port 7 (other components of DP 3 are notshown). When DP 3 and RP 2 are connected (forming pump 6), reservoir 32resides within vented compartment 22 and doser 33 resides within sealedcompartment 21. Electronic module 23 (dotted line) comprises powersource (battery) 45, processor 48, transceiver 46, buzzer 99, andsensors—acceleration sensor (accelerometer) 47, low battery sensor 92,air bubbles sensor 95, revolution sensor 81, occlusion sensor 97, lowreservoir sensor 98, and doser plunger position sensors 93 and 94.Actuation module 24 comprises motor 49, gear 50, and rod (drive screw)26. Power source 45 may be a single use battery or a rechargeablebattery. In some embodiments of the present disclosure, power source 45is rechargeable and recharging may be implemented in contactlessfashion. For example, power source 45 may be recharged using aninductive mechanism. In some embodiments of the present disclosure,power source 45 is rechargeable and recharging may be implemented byproviding electrical contacts that traverse shell 44 of RP 2. Powersource 45 may provide power to any of the components of electronicsmodule 23 and actuation module 24. Transmitter/receiver 46 may be, forexample, a wireless transmitter/receiver. In some embodiments of thepresent disclosure, transmitter/receiver 46 may be a Bluetooth radio andmore specifically, transmitter/receiver 46 may be a low energy Bluetooth(BLE) radio. Accelerometer 47 may be a sensor configured to measure theacceleration applied to pump 6 on all three physical axes (x, y, and z).In some embodiments of the present disclosure, accelerometer 47 maymeasure gravitational acceleration, whereas in other embodimentsaccording to the present disclosure accelerometer 47 may not measure theforce of gravity. In some embodiments according to the presentdisclosure accelerometer 47 may measure the rate of rotation of pump 6around each of the three physical axes. Accelerometer 47 is connected toprocessor 48 which can process acceleration data and calculate patient'senergy expenditure (caloric consumption). Energy expenditure data is amajor parameter in tailoring patient's insulin basal delivery rate,calculation of total daily, activity related, caloric consumption, andcalculation of meal bolus delivery with bolus calculator. Accelerometer47 may continuously monitor body movements and may be used as a firstindicator for detection hypoglycemia during the night. In someembodiments of the present disclosure, accelerometer 47 can be used as apatient interface with pump 6. For example, instructions tomicroprocessor 48 may be provided by tapping on pump 6 and havingcertain tap sequences corresponding to certain instructions detected byaccelerometer 47 and subsequently processed by the microprocessor. Forexample, in some embodiments in which the infusion fluid is insulinintended at providing glucose control in a diabetes patient, certaintaps may correspond to insulin boluses of various sizes prior to meals.For example, if each tap is preprogrammed to 1 unit of insulin,administration of 6 units requires 6 taps. Microprocessor 48 may be achip incorporating all functions of a computer's central processing uniton one or more integrated circuit. Microprocessor 48 may accept digitaldata from transmitter/receiver 46 and accelerometer 47. Microprocessor48 may process inputs according to instructions stored in its memory,and provide results as output. Thus, inputs and outputs to and frommicroprocessor 48 may be to and from transmitter/receiver 46,accelerometer 47, buzzer 99, and sensors. Transmitter/receiver signalsmay originate in a remote controller, smartphone, and personal computerusing RF radio communication protocol such as Bluetooth or a low energyBluetooth. In some embodiments of the present disclosure, signalsreceived at transmitter/receiver 46 may originate from a blood glucosemeter, a continuous glucose monitor, or any physiological sensor whichmay be external to pump 6. Signals originating from sensors internal topump 6 may be directly received in microprocessor 48. Outputs frommicroprocessor 48 may be signals directed to actuation module 24 anddirected at causing rod 26 to advance or retract linearly. Outputs frommicroprocessor 48 may also be transmitted by transmitter/receiver 46 toexternal devices such as remote controllers, smartphones, personalcomputers, and servers. Microprocessor 48 may store in its memorycomputer programs directed at causing doser 33 to deliver infusion fluidin predetermined fashion. In some embodiments of the present disclosure,microprocessor 48 may store in its memory computer programs implementingclosed loop control algorithms. Microprocessor 48 may receive andprocess inputs from various sensors that are embedded on printed circuitboard (PCB) 91 at designated locations. Data received from sensors andprocessed by processor may be wirelessly transmitted through transceiver46 to any remote controller/monitor (controller 200, smartphone 500, PC600, etc.) and may be presented as alerts and/or alarms. Low batterysensor 92 alerts the patient to replace RP 2 before battery end of life.Upon receiving the alert, the patient should disconnect pump 6 fromcradle 5, disconnect RP 2 and DP 3 and reconnect DP 3 and fully chargedRP 2 as shown in FIG. 23. Revolution sensor 81 counts motor revolutionsby any means known in the art, for example, two or more vanes rotatingin between a light emitting diode (LED) and a photodiode. Revolutionsensor 81 data (counting number of revolutions) is assessed bymicroprocessor 48, if there is a mismatch between programmed and realtime revolution counting (i.e. missed pulses), patient receives alarm oralert (presented on any user interface). Mismatch (missing pulses)between processor commands and actual motor revolutions may be aconsequence of stuck motor (i.e. breakage of a hinge or a gear) or highresistance to motor rotation (i.e. occlusion of fluid path). Occlusionsensor 97 detects torque between motor 49 and gear 50, and between gear50 and rod 26 (driving screw). Increased torque in gear or motor can becaused by motor or gear malfunctions or increased resistance to motoroperation due to occlusion in fluid flow path. Distinction betweenmotor/gear malfunction and fluid path occlusion can be effected by theprocessor commanding backward motion of rod 26 (reversing motordirection of revolution (i.e. clockwise to counterclockwise), as shownin FIG. 34. If torque is increased due to gear or motor malfunction(i.e. hinge breakage) torque remains high at reversing motor directionof revolution. If torque is increased due to occlusion (highresistance), torque is decreased at reversing motor direction ofrevolution. Occlusion sensor 97 data is assessed by processor 48,transmitted to any user interface, and presented as occlusion alarm(warning). User operation at receiving occlusion warning is shown inFIG. 35). Plunger position sensors 93, 94, and 98 comprise LED andphotodiode; the principle of operation is further detailed in FIG. 36.End of reservoir sensor 98 detects reservoir plunger 36 position whenvolume in reservoir 32 is low and reservoir 32 should be refilled (asshown in FIG. 23). In some embodiments, additional plunger positiondetectors may be provided alerting the patient when volume in reservoirreaches predetermined thresholds (i.e. decreasing insulin volumes—100 U,90 U, 80 U . . . until 20 U when reservoir should be refilled). In oneembodiment a window (not shown) in septum 20 (dividing sealed 21 andvented 22 compartments of RP 2) provides a line of site between end ofreservoir sensor 98 and reservoir 32. When plunger 36 reached end ofvolume position it is aligned with the window and disables lighttransmission through the window. Sensors 93 and 94 detect doser plunger40 positions at start and end of plunger 40 movement within doser 33.Detailed description of operation modes of sensors 93 and 94 are furtherdescribed in FIG. 36. Sensors 93 and 94 provide processor 48 withlocation of plunger 40 and accordingly controlling motor 49 direction ofrevolution and forward or backward motion of rod 26 as detaileddescribed in FIG. 34. Air bubble sensor 95 detects air bubbles travelingin conduit 67 toward exit port 7. Air bubble sensor 95 may be operatedwith piezoelectric ultrasonic transducers. The measurement of thepropagation time is based on alternate transmission and reception ofultrasonic pulses in and against the direction of flow. The sensorperforms noncontact detection of air and gas bubbles in the liquidthrough the tube wall, and thus allows continuous quality monitoring.Two piezoelectric ultrasonic transducers work as transmitter andreceiver. In another embodiment, air bubble sensor 95 is an optic sensordetecting light transmission through transparent conduit 67. In thisconfiguration sensor 95 is facing a window (not shown) in the side of RPshell 44′ facing DP 3.

With reference to FIG. 32, in some embodiments, a longitudinal crosssection of device 1 is shown. Pump 6 is comprised of RP 2 and DP 3. Pump6 is connected to cradle 4 that adhere to patient skin 80. DP 3 includesbase 31, exit port 7, conduit 67 and connecting needle 88. Member 58including septum 58′ is connected to cannula 9 that traverses cradle 4through opening 54. Connecting needle 88 pierces septum 58′ and resideswithin member 58 providing fluid communication between conduit 67 andcannula 9. Pump 6 may be connected to cradle 4 with a snap mechanism 8as shown in FIG. 17. In some embodiments, cradle 4 is connected to pumpwith magnets 111, 112. Magnets 111 and 112 can resides in RP 2 or cradle4 and a ferromagnetic member may be located on the other sideinterchangeably. Ferromagnetic member may be the RP 2 shell 44. Magnetswithin RP 2 may be a permanent magnets or electromagnets.

With reference to FIGS. 33A-B, in some embodiments, schemes of magnetic(33 a) and mechanical (33 b) reversible connections of rod 26 with doserplunger 40 are shown. During connection of RP 2 and DP 3, for exampleafter refilling, rod 26 and plunger 40 should be engaged such thatforward and backward linear motion of rod 26 moves plunger 40 and doser33 as detailed in FIG. 26. FIG. 33a shows a scheme of magneticconnection between rod coupling means 27 and plunger coupling means 41.A Magnet may reside in both coupling means and a counter ferromagneticmember may reside in the opposite coupling means. FIG. 33b shows ascheme of mechanical connection, in this example a ball and socketmechanism. Rod coupling means 27 is reversibly engaged with plungercoupling means 41. A combination of mechanical and magnetic couplingmeans is also possible.

With reference to FIG. 34, in some embodiments, a scheme of motor 49operation modes (1-6) during the various phases of plunger movement andfluid dispensing is shown. Upon command of processor 48 (1) motor 49rotates in clockwise direction and causes via gear (not shown) a forwardmovement (direction of arrow) of plunger 40 (2). When plunger 40 reaches“end of doser point” 40′ (detected by plunger position and/or rotationsensors (not shown) or calculated by an algorithm), processor 48receives a signal (3) and commands motor 49 to reverse direction ofrotation (counterclockwise) (4). Motor 49 rotation in a counterclockwisedirection moves plunger 40 in a backward direction (arrow) (5). Whenplunger 40 reaches initial point 40′, processor 48 receives a command toreverse direction of rotation (6) and the operation cycle restarts.

With reference to FIGS. 35A-B, in some embodiments, a scheme ofprocesses conducted by the patient upon receiving occlusion warning isshown. Occlusion in fluid path can happen within the pump 6 (i.e.occlusion within conduits 66, and 67 shown in FIG. 25), or occlusion ofcannula 9 (for example, in cases of cannula kinking or insulincrystallization). Cannula 9 occlusion requires replacement of cannula 9,cradle 4, and member 58. Occlusion of conduits within pump requiresreplacement of DP 3. When patient receives occlusion warning oncontroller 200 (FIG. 35a ), pump 6 should be disconnected from cradle 4and member 58 (FIG. 35b ). When pump 6 is operated (i.e. small bolusadministration) and there is no occlusion within pump, drops of fluidsshould be seen emerging from connecting needle 88 and occlusion warningshould disappear. In this case, occlusion is within cannula 9 andaccordingly, cradle 4, member 58, and cannula 9 should be replaced. Ifdrops are not seen during pump operation and occlusion warning remains,occlusion is within pump and DP3 should be replaced.

With reference to FIGS. 36A-B, in some embodiments, schemes of end ofreservoir sensor 98 are shown. Sensor 98 detects plunger 36 positionwithin reservoir 32. Septum 20 divides RP 2 into vented compartment 22and sealed compartment 21. Septum 20 includes a transparent window 20′that provides line of site between the vented and sealed compartments.Reservoir 32 resides within vented compartment 22 and sensor 98 resideswithin sealed compartment 21. In one embodiment, end of reservoir sensor98 includes a LED 121 and a photodiode 122. During pump operationreservoir 32 volume continuously decreases and plunger 36 passivelymoves forward. FIG. 36a shows the situation when plunger 36 is notaligned with window 20′. In this condition, light emitted from LED 121transverses the transparent window 20′ as shown by arrow. FIG. 26b showsthe position of plunger 36 when reservoir replacement is indicated(preprogrammed by manufacturer or patients, for example when theremaining volume is 10 U of insulin). When plunger 36 is aligned withwindow 20′, light emitted from LED 121 is reflected and detected byphotodiode 122 (arrows). Accordingly the signal from the sensor goes tothe processor, transmitted to the controller and presented to thepatient as an end of reservoir alert. In some embodiments, sensor 98 maybe comprised of piezoelectric ultrasonic transducers that work astransmitter and receiver. The position of doser plunger 40 may bedetected by sensors 93 and 94 of FIG. 31 using the above mentioned lightor acoustic detection means.

With reference to FIG. 37, in some embodiments, a block diagram ofdiabetes management system 100 is shown. System 100 includes an infusionpump 6 that comprises a reusable part (RP) 2 and a disposable part (DP)3 (when connected forming pump 6), charger 101, controller 200,smartphone 500, BGM 400, and CGM 300. BGM 400 and CGM 300 may functionas standalone devices. CGM 300 may receive blood glucose readingsdirectly from BGM 400 for calibrations. Controller 200 may be anyelectronic device that communicates with RP 2 in any proprietary orpublic RF communication protocol. In some embodiments, controller 200 isany electronic device that communicates with remote server (cloudcommunication) and RP 2. In this configuration, pump operation andpersonal data software may be downloaded from remote server and storedwithin any electronic device which becomes a controller 200 of RP 2.Smartphone 500 may be any electronic device that communicates with thecontroller in any proprietary or public RF protocol and has a cellularcommunication capability. RP 2 comprises electronic module 23 andactuation module 24. Electronic module 23 includes processor 48,transceiver 46, battery 45, accelerometer 47, reservoir and dosersensors 93, 94, 98, revolution sensor 81, buzzer and air bubbles sensors(not shown), and artificial pancreas (AP) algorithm 120 (resides withinprocessor 48 as shown in dotted line). Battery 45 is recharged byinduction using charger 101. Controller 200 includes a processor (notshown), user interface 130, transceiver 140, and bolus calculator 150.Controller 200 may include a microphone, a speaker, and a camera (notshown). Smartphone 500 includes user interface 160 and transceiver 170.In some embodiments, AP algorithm 120 may reside in controller 200,bolus calculator may reside in RP 2, or both may reside in controller200 or RP 2. Reference is made now to RP 2. Processor 48 comprises aCPU, memory, operation software, and AP algorithm. Processor 48 receivesinputs from accelerometer 47, sensors 93, 94, 97, 98, 81, CGM 300, BGM400 and controller 200. Inputs to processor 48 from controller, CGM, andBGM are received via transceiver 46. Processor 48 outputs are commandsto actuation module 24 and alerts, alarms, and log files via transceiver46 to controller 200. Reference in now made to controller 200.Controller transceiver 140 has two way communication with RP 2, and CGM300 and one way communication with BGM 400 (inputs) and smartphone 500(outputs) using any RF communication protocol. User interface 130 may betouch screen, buttons, microphone, or camera. Patient's commands (i.e.insulin bolus, basal profile change, etc.) may be received by userinterface 130 and transmitted via transceiver 140 to RP 2. Patient'scommands may be transmitted to smartphone 500 and further on to remoteviewer upon patient discretion (i.e. a child administers insulin andhis/her parent receives the data, on-line, on parent's smartphone).Controller 200 may receive and present on-line and stored data from CGM300 such as continuous glucose levels, alerts, alarms, and log files.Data from CGM may be used by bolus calculator 150. Controller 200 maytransmit inputs to CGM 300, for example, blood glucose level receivedfrom BGM 400 for CGM calibration. Controller 200 may receive and presenton-line and stored data from BGM 400 such as blood glucose levels,alerts, alarms, and log files. Data from BGM 400 may be used by boluscalculator 150. Bolus calculator 150 is software providing the patientwith insulin bolus dose recommendations before meals. Bolus calculatorsoftware resides within controller processor (not shown). Inputs forbolus calculator include the following data points: carbohydrate contentand glycemic index of the meal, and delivery pattern—received frompatients through user interface, insulin on board (remaining insulinfrom previous bolus administration)—calculated by processor, bloodglucose—received from BGM 400, and glucose level trends—received fromCGM 300. Insulin sensitivity index and carb factor may be received fromhealth care provider or patient through user interface 130 and can bestored within controller processor. If bolus calculator resides on RP 2processor 48, all data received from user is transmitted from controller200 to RP 2 and data points from BGM 400 and CGM 300 are transmitteddirectly to RP 2. Bolus calculation is done within processor 48.Reference in now made to smartphone 500. Smartphone comprises userinterface 160 and transceiver 170. Smartphone 500 may receive inputsfrom RP 2, controller 200, CGM 300, and BGM 400. Inputs may be presentedand/or transmitted to remote stations (i.e. family member, physician,etc.) via cellular protocol to cloud 700. In some embodiments (e.g.,FIGS. 41-44), smartphone can be used as RP 2 controller. Reference isnow made to operation modes of diabetes management system 100. In firstoperation mode (“manual”), pump 6 is programmed by patient withcontroller 200. Programing with controller 200 includes setting of basaldelivery patterns and on demand bolus command. In second operation mode(“open loop system”), processor 48, via transceiver 46, continuouslyreceives glucose readings from CGM 300 and accordingly adjusts operationof actuation module 24 and insulin administration from reservoir 32 anddoser 33. In this operation mode, meal bolus commands set by patient aretransmitted from controller 200 to processor 48 and accordinglyprocessor 48 commands operation of actuation module 24 and insulinadministration from reservoir 32 and doser 33. In third operation mode(“artificial pancreas” or “closed loop system, or “automated glucosecontrol system”), controller 200 is not involved and insulin basal andbolus administration is fully automatic. Artificial pancreas (AP)algorithm software 120 resides within processor 48 (dotted line) andcontrols actuation module 24 operation according to patients glucoselevels that are continuously transmitted from CGM 300 to processor 48via transceiver 46. Insulin administration data, alerts and alarms maybe transmitted to controller 200 or smartphone 500 providing the patientwith ongoing data on pump 6 operation and glucose levels.

With reference to FIG. 38, in some embodiments, a block diagram of anembodiment of insulin management system 100 is shown. Insulin managementsystem 100 comprises web server 900, bridge device 1000, and insulinpatch pump 1. There is a two-way data communication channel 901 betweenserver 900 and bridge 1000, and a two-way data communication channel 902between bridge 1000 and pump 1.

With reference to FIGS. 39A-B, in some embodiments, examples of bridgedevices (a-d) are shown. Bridge device 1000 may be any consumerelectronic device that includes a user interface and RF transceiver. Forexample, bridge device 1000 may be a smartphone 500, 501 (39 a-b), smartwatch 502 (39 c) (i.e. iWatch, Pebble watch), PC 600 (39 d), and tablet(not shown). Communication 902 between bridge devices 1000 and pump 1may be RF communication (FIG. 39 a, c, d) or near field communication(NFC) (FIG. 39b ). Communication 901 between server 900 and bridgedevice 1000 through cloud 700 may be cellular or RF (i.e. Wi-Fi).

With reference to FIG. 40, in some embodiments, a schematic diagram ofserver 900 is shown. Server 900 comprises CPU 901, data communicationmodule 902, and memory 903. Memory 903 may store patient data 910, suchas the patient's insulin management programs and records and a uniqueidentity for pump 6.

With reference to FIG. 41, in some embodiments, a schematic diagram ofbridge device 1000 is shown. Bridge 1000 comprises a CPU 1001, a datacommunication module 1002, a memory 1003, and a man-machine interface1004. Memory 1003 stores pump identification, patient data, insulindelivery instructions, and software for pump control. A softwareapplication 1008, which may be downloadable from an application storesuch Apple's AppStore or Google's GooglePlay, resides in memory 1003.Software application 1008 is configured to endow the bridge 1000 withthe ability to instruct and control pump 1 and communicate informationbetween pump 1 and server 900. In order to make insulin managementsystem 1 operable, the user performs the following steps:

-   -   If software application 1008 is not already on bridge 1000 then        the user downloads application 1008 to bridge 1000. The        application may verify its own integrity once on bridge 1000.    -   Application 1008 on bridge 1000 requests user authentication        such as a password, a finger print or other biometric data.    -   The user authentication information provided to bridge 1000 by        the user is communicated via channel 901 to server 900 and        verified there against the user's ID, which is part of patient        data 910.    -   If authentication is successful then the server sends some or        all of the user's data 910 (including pump identification        information) to bridge 1000.    -   Bridge 1000 and pump 1 pair.    -   Optionally, the user is notified that bridge 1000 and pump 1        have paired.    -   Optionally, the user authorizes the bridge 1000 to send the user        data to pump 1.    -   Pump 1 stores user data 910. Optionally, pump 1 verifies user        data 910 and decrypts the data if it is signed and/or encrypted.    -   Pump 1 is ready to deliver insulin according to user's data 910.        Note that insulin management system 100 allows the user to endow        various bridge devices with controller capabilities easily,        securely and swiftly. Thus, if for example, a given bridge        device 1000 becomes inoperable (battery is depleted, bridge        device is forgotten or lost, and so forth), then another readily        available bridge device can be made operable conveniently and        quickly by downloading software application 1008 and performing        the authentication process vis a vis the server. When using        software application 1008 on bridge 1000, user may provide the        pump with insulin delivery instruction:    -   User provides instruction to bridge 1000 via man machine        interface 1004.    -   Bridge 1000 communicates instruction to pump 1 via channel 902.    -   User is notified that pump 1 received the instruction.    -   Bridge 1000 records instructions on server 900 as early as        practicable in order to make them available to a new bridge        device should one be required.

Additional embodiments of the subject application include a portablefluid infusion device, comprising: a first reservoir; a second reservoirhaving a plunger; an exit port; a first conduit configured to allow aunidirectional fluid communication from the first reservoir to thesecond reservoir; a second conduit configured to allow a unidirectionalfluid communication from the second reservoir to the exit port; whereindisplacement of the plunger in a first direction is designed to causeflow of fluid from the first reservoir to the second reservoir via thefirst conduit, and displacement of the plunger opposite to the firstdirection is designed to cause flow of fluid from the second reservoirto the exit port via the second conduit. In some embodiments, the firstreservoir comprises a filling port for receiving fluid into the firstreservoir, and/or a prefilled replaceable reservoir. Further, the firstreservoir comprises a second plunger configured to transition betweentwo ends of the first reservoir in the first direction and/or in adirection opposite to the first direction, wherein the advancement ofthe second plunger in the direction opposite to the first direction isconfigured to cause flow of fluid from the first reservoir to the secondreservoir.

In some embodiments, the portable fluid infusion device comprises anelectronic module and an actuation module for operating the displacementof the plunger in the first direction and/or opposite to the firstdirection. In some embodiments, the electronics module comprises a powersource, a processor, a transceiver, a buzzer, and/or a sensor, whereinthe power source comprises a replaceable modular battery or arechargeable battery. Further, the sensor can include one or more of: amotion sensor, a power source level sensor, air bubble sensor,revolution sensor, occlusion sensor, reservoir level sensor, and/orplunger position sensor. In some embodiments, the first reservoir maycomprise a first reservoir plunger, and the reservoir level sensor maycomprise a first reservoir sensor configured to detect a position of thefirst reservoir plunger within the first reservoir so as to determineamount of remaining fluid in the first reservoir. In some embodiments,the reservoir level sensor may comprise a second reservoir sensorconfigured to detect a position of the plunger of the second reservoirso as to determine amount of remaining fluid in the second reservoir.Further, the air bubble sensor may detect air bubbles travelling throughthe second conduit.

In some embodiments, the actuation module may comprise an actuator and arod, the rod configured to operably couple to the plunger to drive thedisplacement of the plunger in the first and/or opposite to the firstdirections. In some embodiments, the actuation module comprises anactuator and a rod, the rod configured to operably couple to the plungerto drive the displacement of the plunger in the first and/or opposite tothe first directions. Further, the portable fluid infusion device maycomprise a rod coupling means coupled to the rod and a plunger couplingmeans coupled to the plunger, wherein a connection between the rodcoupling means and the plunger coupling means allows the rod to operablycouple to the plunger, wherein the connection between the rod couplingmeans and the plunger coupling means is mechanical and/or magnetic. Insome embodiments, a distal end of the first reservoir may align with orextend beyond distal end of the rod upon maximum displacement of theplunger in the first direction.

In some embodiments, a portable fluid infusion device comprises a firstreservoir; a second reservoir having a plunger, a first opening and asecond opening; an exit port; a first conduit for establishing fluidcommunication between the first reservoir and the second reservoir uponalignment of an end of the first conduit with the first opening; and asecond conduit for establishing fluid communication between the secondopening and the exit port upon alignment of an end of the second conduitwith the second opening; wherein displacement of the plunger in a firstdirection is configured to align the end of the first conduit with thefirst opening and displacement of the plunger in a direction opposite tothe first direction is configured to align the end of the second conduitwith the second opening. In some embodiments, the first reservoircomprises a filling port for receiving fluid into the first reservoir,and/or the first reservoir comprises a prefilled replaceable reservoir.In some embodiments, the first reservoir comprises a second plungerconfigured to transition between two ends of the first reservoir in thefirst direction and/or in the direction opposite to the first direction,wherein the advancement of the second plunger in the direction oppositeto the first direction is configured to cause flow of fluid from thefirst reservoir to the second reservoir.

Further, in some embodiments, the portable fluid infusion devicecomprises an electronic module and an actuation module for operating thedisplacement of the plunger in the first and/or opposite to the firstdirections, wherein the electronics module comprises a power source, aprocessor, a transceiver, a buzzer, and/or a sensor. In someembodiments, the sensor may include one or more of a motion sensor, apower source level sensor, air bubble sensor, revolution sensor,occlusion sensor, reservoir level sensor, second reservoir motionsensor, second reservoir position sensor, and/or plunger positionsensor. In some embodiments, the actuation module comprises an actuatorand a rod, the rod configured to operably couple to the plunger to drivethe displacement of the plunger and/or the second reservoir. Further,the actuation module may comprise a rod coupling means coupled to therod and a plunger coupling means coupled to the plunger, wherein aconnection between the rod coupling means and the plunger coupling meansallows the rod to operably couple to the plunger, wherein the connectionbetween the rod coupling means and the plunger coupling means ismechanical and/or magnetic. In some embodiments of the portable fluidinfusion device, the distal end of the first reservoir aligns with orextends beyond distal end of the rod upon maximum displacement of theplunger in the first direction.

In some embodiments, a disposable skin interface for a portable fluidinfusion device includes a disposable part (DP) containing a firstreservoir and a second reservoir having a plunger, and a reusable part(RP) containing at least two compartments for receiving the firstreservoir and the second reservoir separately. The disposable skininterface comprises a cannula; a removable inserter for inserting thecannula into through a surface of a body; and a cradle for providingsupport to the cannula and the inserter, said cradle configured toestablish reversible connection with the portable fluid infusion deviceupon removal of the inserter from the cradle so as to allow flow offluid from the second reservoir of the portable fluid infusion deviceinto the body upon displacement of the plunger. In some embodiments, theremovable inserter further comprises a skin penetrating member connectedto the inserter for aiding in the insertion of the cannula through thesurface of the body, wherein the skin penetrating member is configuredto retract into the removable inserter leaving the cannula embedded inthe surface of the body. Further, the cradle can be reversibly connectedto the portable fluid infusion device via magnetic and/or mechanicalconnection between the cradle and the portable fluid infusion device,wherein the magnetic connection between the cradle and the portablefluid infusion device comprises a magnetic connection between the cradleand one or more of: a ferromagnetic material in a shell of the RP, amagnet in the RP, an electromagnet in the RP and a magnetic metal in theDP. In some embodiments, the mechanical connection between the cradleand the portable fluid infusion device may comprise a snap mechanism.The cradle may comprise a window for allowing visual access to site ofcannula insertion on the surface of the body.

In some embodiments, a diabetes management system comprises at least oneof a blood glucose monitor (BGM) and a continuous glucose monitor (CGM),wherein the BGM is configured to measure a blood glucose level of a bodyand transmit the blood glucose level to a processor; and the CGM isconfigured to detect data on blood glucose level trends of a body andtransmit the blood glucose level trends data to the processor. Further,the management system includes a portable insulin infusion device,communicatively coupled to the controller and/or the smartphone,configured to deliver an amount of insulin to the body upon receivinginstructions from the processor. In some embodiments, the processor maybe communicatively coupled to at least one of a blood glucose monitor(BGM) and a continuous glucose monitor (CGM), may be configured to:determine the amount of insulin to be delivered to the body based on atleast the transmitted blood glucose level, the transmitted blood glucoselevel trends data, and/or health data of the body from an externaldevice; and transmit the instructions to the portable insulin infusiondevice indicating the amount of insulin to be delivered to the body. Insome embodiments, the system operates in a closed loop mode wherein theprocessor is a processor in the insulin infusion device, and/or in anopen loop mode wherein the processor is a processor in the externaldevice. Further, the portable insulin infusion device may comprisesensors including at least one of a motion sensor, a power source levelsensor, air bubble sensor, revolution sensor, occlusion sensor,reservoir level sensor, and plunger position sensor; and the portableinsulin infusion device may transmit data measured by the sensors to thecontroller and/or the smartphone.

In some embodiments, a method for delivering fluid into a body comprisesthe steps of establishing contact to a surface of the body via adisposable skin interface configured to insert a cannula into the body;providing a portable fluid infusion device comprising a disposable part(DP) containing a first reservoir having the fluid and a secondreservoir having a plunger, and a reusable part (RP) containing anactuation module; and operating the actuation module to: displace theplunger in a first direction so as to cause the fluid to be flow fromthe first reservoir to the second reservoir; displace the plunger in anopposite direction so as to cause that fluid to flow from the secondreservoir to an exit port of the portable fluid infusion device; andestablish fluid communication between the exit port of the portablefluid infusion device and the cannula inserted into the body so as toallow the entry of the fluid into the body.

In some embodiments, a diabetes management system, comprises a portablefluid infusion device configured to deliver an amount of fluid into abody of a patient upon receiving fluid infusion instructions; a bridgedevice; and a server, communicatively coupled to the portable fluidinfusion device and the bridge device, configured to: provide the bridgedevice with applications for controlling operations of the portablefluid infusion device; and authenticate access authorization for a userof the bridge device accessing the applications. In some embodiments,the bridge device, communicatively coupled to the portable fluidinfusion device, is configured to: receive patient data from theportable fluid infusion device and/or the user of the bridge device;determine the amount of fluid to be delivered to the body based on atleast the received patient data; and transmit the fluid infusioninstructions to the portable fluid infusion device indicating the amountof fluid to be delivered to the body.

In some embodiments, a method for operating a fluid infusion devicecomprises the steps of receiving, from an occlusion sensor in a portablefluid infusion device, a warning indicating occurrence of occlusion, theportable fluid infusion device comprising a disposable part (DP) havingan exit port, and a reusable part (RP) comprising an actuation moduleand the occlusion sensor; operating the actuation module so as todetermine source of the occlusion; determining a presence of flow offluid exiting the exit port as a result of the operation of theactuation module; and replacing the DP if the presence of flow of fluidexiting the exit port is not detected. The method further comprises thesteps of replacing a cannula if the presence of flow of fluid exitingthe exit port is detected, wherein a disposable skin interfacecomprising the cannula provides an interface allowing the portable fluidinfusion device to infuse fluid into a body, and wherein the occlusionsensor determines the occurrence of occlusion based on comparison oftorque at the actuation module when a motor of the actuation module isrotated in a clockwise and an anticlockwise directions.

In some embodiments, a method for removing air bubbles from a fluidinfusion device comprises the step of: orienting a portable fluidinfusion device so as to cause migration of air bubbles inside areservoir having a plunger towards an opening at an end of thereservoir, wherein the reservoir comprises a plunger; and the portablefluid infusion device comprises: a disposable part (DP) having thereservoir and an exit port, and a reusable part (RP) comprising anactuation module. The method further comprises the step of operating theactuation module so as to cause an oscillation of the plunger until atleast a substantial amount of the air bubbles are discharged through theexit port, wherein the plunger is oscillated at a pre-programmed rate.In some embodiments, the method also comprises the step of determining apresence of the air bubbles via an air bubble sensor detecting travel ofthe air bubbles through a conduit leading to the exit port, wherein theair bubble sensor is operated by piezoelectric ultrasonic transducers,and the conduit is transparent, and the air bubble sensor comprises anoptic sensor detecting light transmission through the transparentconduit.

While various inventive embodiments have been described and illustratedherein, those of ordinary skill in the art will readily envision avariety of other means and/or structures for performing the functionand/or obtaining the results and/or one or more of the advantagesdescribed herein, and each of such variations and/or modifications isdeemed to be within the scope of the inventive embodiments describedherein. More generally, those skilled in the art will readily appreciatethat all parameters, dimensions, materials, and configurations describedherein are meant to be an example and that the actual parameters,dimensions, materials, and/or configurations will depend upon thespecific application or applications for which the inventive teachingsis/are used. Those skilled in the art will recognize, or be able toascertain using no more than routine experimentation, many equivalentsto the specific inventive embodiments described herein. It is,therefore, to be understood that the foregoing embodiments are presentedby way of example only and that, within the scope of the appended claimsand equivalents thereto, inventive embodiments may be practicedotherwise than as specifically described and claimed. Inventiveembodiments of the present disclosure are directed to each individualfeature, system, article, material, kit, and/or method described herein.In addition, any combination of two or more such features, systems,articles, materials, kits, and/or methods, if such features, systems,articles, materials, kits, and/or methods are not mutually inconsistent,is included within the inventive scope of the present disclosure. Atleast some of the disclosed embodiments may be distinguishable from theprior art by expressly lacking one and/or another feature(s) taught bythe prior art. Thus, claims directed to such embodiments may bedistinguished from the prior art by including negative limitations.

Also, various inventive concepts may be embodied as one or more methods,of which an example has been provided. The acts performed as part of themethod may be ordered in any suitable way. Accordingly, embodiments maybe constructed in which acts are performed in an order different thanillustrated, which may include performing some acts simultaneously, eventhough shown as sequential acts in illustrative embodiments.

At least some of the embodiments disclosed above, in particular at leastsome of the methods/processes disclosed, may be realized in circuitry,computer hardware, firmware, software, and combinations thereof (e.g., acomputer system). Such computing systems, may include PCs (which mayinclude one or more peripherals well known in the art), smartphones,specifically designed medical apparatuses/devices and/or othermobile/portable apparatuses/devices. In some embodiments, the computersystems are configured to include clients and servers. A client andserver are generally remote from each other and typically interactthrough a communication network (e.g., VPN, Internet). The relationshipof client and server arises by virtue of computer programs running onthe respective computers and having a client-server relationship to eachother.

Some embodiments of the disclosure (e.g., methods and processesdisclosed above) may be embodied in a computer program(s)/instructionsexecutable and/or interpretable on a processor, which may be coupled toother devices (e.g., input devices, and output devices/display) whichcommunicate via wireless or wired connect (for example).

Any and all references to publications or other documents, including butnot limited to, patents, patent applications, articles, webpages, books,etc., presented anywhere in the present application, are hereinincorporated by reference in their entirety. Moreover, all definitions,as defined and used herein, should be understood to control overdictionary definitions, definitions in documents incorporated byreference, and/or ordinary meanings of the defined terms.

The indefinite articles “a” and “an,” as used herein in thespecification and in the claims, unless clearly indicated to thecontrary, should be understood to mean “at least one.”

The phrase “and/or,” as used herein in the specification and in theclaims, should be understood to mean “either or both” of the elements soconjoined, i.e., elements that are conjunctively present in some casesand disjunctively present in other cases. Multiple elements listed with“and/or” should be construed in the same fashion, i.e., “one or more” ofthe elements so conjoined. Other elements may optionally be presentother than the elements specifically identified by the “and/or” clause,whether related or unrelated to those elements specifically identified.Thus, as a non-limiting example, a reference to “A and/or B”, when usedin conjunction with open-ended language such as “comprising” can refer,in one embodiment, to A only (optionally including elements other thanB); in another embodiment, to B only (optionally including elementsother than A); in yet another embodiment, to both A and B (optionallyincluding other elements); etc.

As used herein in the specification and in the claims, “or” should beunderstood to have the same meaning as “and/or” as defined above. Forexample, when separating items in a list, “or” or “and/or” shall beinterpreted as being inclusive, i.e., the inclusion of at least one, butalso including more than one, of a number or list of elements, and,optionally, additional unlisted items. Only terms clearly indicated tothe contrary, such as “only one of” or “exactly one of,” or, when usedin the claims, “consisting of,” will refer to the inclusion of exactlyone element of a number or list of elements. In general, the term “or”as used herein shall only be interpreted as indicating exclusivealternatives (i.e. “one or the other but not both”) when preceded byterms of exclusivity, such as “either,” “one of,” “only one of,” or“exactly one of.” “Consisting essentially of,” when used in the claims,shall have its ordinary meaning as used in the field of patent law.

As used herein in the specification and in the claims, the phrase “atleast one,” in reference to a list of one or more elements, should beunderstood to mean at least one element selected from any one or more ofthe elements in the list of elements, but not necessarily including atleast one of each and every element specifically listed within the listof elements and not excluding any combinations of elements in the listof elements. This definition also allows that elements may optionally bepresent other than the elements specifically identified within the listof elements to which the phrase “at least one” refers, whether relatedor unrelated to those elements specifically identified. Thus, as anon-limiting example, “at least one of A and B” (or, equivalently, “atleast one of A or B,” or, equivalently “at least one of A and/or B”) canrefer, in one embodiment, to at least one, optionally including morethan one, A, with no B present (and optionally including elements otherthan B); in another embodiment, to at least one, optionally includingmore than one, B, with no A present (and optionally including elementsother than A); in yet another embodiment, to at least one, optionallyincluding more than one, A, and at least one, optionally including morethan one, B (and optionally including other elements); etc.

In the claims, as well as in the specification above, all transitionalphrases such as “comprising,” “including,” “carrying,” “having,”“containing,” “involving,” “holding,” “composed of,” and the like are tobe understood to be open-ended, i.e., to mean including but not limitedto. Only the transitional phrases “consisting of” and “consistingessentially of” shall be closed or semi-closed transitional phrases,respectively, as set forth in the United States Patent Office Manual ofPatent Examining Procedures, Section 2111.03.

What is claimed is:
 1. A portable fluid infusion device, comprising: afirst reservoir; a second reservoir including a plunger and a hollowneedle, the hollow needle configured to allow flow of fluid into and/orout of the second reservoir; a dual chamber assembly comprising a firstchamber compartment and a second chamber compartment; an exit port; afirst conduit configured to communicate fluid between the firstreservoir and the first chamber compartment of the dual chamberassembly; and a second conduit configured to communicate fluid betweenthe exit port and the second chamber compartment of the dual chamberassembly; wherein a tip or an opening of the hollow needle is configuredto transition from the second chamber compartment to the first chambercompartment upon displacement of the second reservoir in a firstdirection and from the first chamber compartment to the second chambercompartment upon displacement of the second reservoir in a directionopposite to the first direction.
 2. The device of claim 1, wherein thefirst reservoir further comprises a filling port for receiving fluidinto the first reservoir.
 3. The device of claim 1, wherein the firstreservoir is configured as a prefilled replaceable reservoir.
 4. Thedevice of claim 1, wherein the first reservoir further comprises asecond plunger configured to transition between two ends of the firstreservoir in the first direction and/or in the direction opposite to thefirst direction.
 5. The device of claim 4, wherein the advancement ofthe second plunger in the direction opposite to the first directioncauses fluid flow from the first reservoir to the second reservoir. 6.The device of claim 1, further comprising an electronic module and anactuation module for operating the displacement of the plunger in thefirst and/or opposite to the first directions.
 7. The device of claim 6,wherein the electronics module comprises a power source, a processor, atransceiver, a buzzer, and/or sensors.
 8. The device of claim 7, whereinthe sensors include one or more of a motion sensor, a power source levelsensor, air bubble sensor, revolution sensor, occlusion sensor,reservoir level sensor, second reservoir motion sensor, second reservoirposition sensor, and/or plunger position sensor.
 9. The device of claim6, wherein the actuation module comprises an actuator and a rod, the rodconfigured to operably couple to the plunger to drive the displacementof the plunger and/or the second reservoir.
 10. The device of claim 9,further comprising a rod coupling means coupled to the rod and a plungercoupling means coupled to the plunger, wherein a connection between therod coupling means and the plunger coupling means allows the rod tooperably couple to the plunger.
 11. The device of claim 10, wherein theconnection between the rod coupling means and the plunger coupling meansis mechanical and/or magnetic.
 12. The device of claim 11, whereindistal end of the first reservoir aligns with or extends beyond distalend of the rod upon maximum displacement of the plunger in the firstdirection.
 13. The device of claim 1, further comprising: a firststopper configured to block a proximal end of the second reservoir uponthe displacement of the second reservoir in the first direction; and asecond stopper configured to block a distal end of the second reservoirupon the displacement of the second reservoir in the direction oppositeto the first direction.
 14. The device of claim 1, wherein the hollowneedle is rigidly coupled to the second reservoir.
 15. The device ofclaim 1, wherein displacement of the plunger in the first direction isconfigured to causes fluid flow from the first reservoir to the firstchamber compartment via the first conduit, and displacement of theplunger opposite to the first direction is configured to causes fluidflow from the second reservoir to the exit port via the second conduit.16. The device of claim 13, wherein the plunger and the second reservoirare operably coupled so as to cause displacement of the second reservoirin a same direction as direction of displacement of the plunger untilone of the first stopper and the second stopper blocks the secondreservoir.
 17. A portable fluid infusion device, comprising: adisposable part (DP) comprising a first reservoir and a secondreservoir, the second reservoir having a length which is less than orequal to the length of the first reservoir; a reusable part (RP)comprising: a first compartment configured to receive the firstreservoir; a second compartment configured to receive the secondreservoir; and a gasket for sealing a junction between the secondreservoir and the second compartment upon connection of the RP and theDP.
 18. The device of claim 17, further comprising a vent configured tovent the first compartment.
 19. The device of claim 18, wherein the ventcomprises an aperture arranged on the device to vent the firstcompartment.
 20. The device of claim 18, wherein the vent is configuredto operate upon connection of the RP and the DP.
 21. The device of claim17, wherein after connection of the RP and the DP, the secondcompartment is sealed and the first compartment is vented.
 22. Thedevice of claim 17, wherein the RP includes a rigid housing.
 23. Thedevice of claim 22, wherein after connection of the RP and the DP, atleast one of the first reservoir and the second reservoir are not incontact with the housing.
 24. The device of claim 22, wherein afterconnection of the RP and the DP, the first reservoir and the secondreservoir do not contact with the housing.
 25. The device of claim 17,further comprising a water resistant member arranged between the RP andthe DP and configured to allow air to pass through the member andsubstantially restrict or prevent the passage of liquid.
 26. The deviceof claim 17, wherein the first compartment includes a non-round openingfor allowing the reception of the first reservoir into the firstcompartment, and/or the second compartment includes a round opening forallowing the reception of the second reservoir into the secondcompartment.
 27. The device of claim 17, wherein maximal height of thesecond reservoir is about equal to maximal height of the firstreservoir.
 28. The device of claim 17, wherein the first reservoirincludes a filling port for receiving fluid into the first reservoir.29. The device of claim 28, wherein the filling port comprises anopening punctured from a silicone membrane of a shell of the firstreservoir.
 30. The device of claim 17, wherein the first reservoir isconfigured as a prefilled replaceable reservoir.